"Be vigilant for signs of bluetongue and report it," Defra has told keepers, and that warning will ring loudly in cattle and sheep country from Cumbria to the Welsh coast. This is no longer a distant briefing out of Whitehall. New confirmations in northern and western livestock areas mean the virus is once again a live issue on real farms, with breeding, movements and cashflow all caught up in the response. Defra's latest position says there have been 343 bluetongue cases in Great Britain in the 2025 to 2026 season, counted from 1 July 2025. Its own country breakdown on the same page lists 321 cases in England and 24 in Wales, which would total 345, so there appears to be a mismatch in the published figures. Separately, Northern Ireland's DAERA has confirmed five BTV-3 cases, while Scotland remains free of cases.

Recent cases show why farmers are taking this seriously. In Cumbria, a stillborn calf with brain deformities tested positive on 1 May, after an aborted calf on 30 April was also confirmed with brain deformities, an enlarged spleen and liver damage. For hill units and dairy farms alike, that is the sort of detail that turns an official update into a hard conversation in the yard. Elsewhere, Defra reported a South Yorkshire cow positive for BTV-3 on 29 May after a sudden milk drop, with other cattle on the holding aborting and calving prematurely. The same day, a cow in Shropshire tested positive after embryo transfer-related testing. In Ceredigion, a cow tested positive on 28 May after producing a dummy calf, and the calf also returned a positive result. On 30 May, England also recorded a new BTV-8 case in a three-week-old calf born with neurological signs; the calf later died. Earlier in May, Defra also confirmed two cows after late-term abortions and one suckler cow after a late-term abortion where the virus type could not be pinned down.

Most English cases this season are BTV-3. Defra says England's 321 cases include 308 cases of BTV-3 only, five of BTV-8 only, seven where both BTV-3 and BTV-8 were found, and one case where the serotype was not known. Wales' 24 confirmed cases are all BTV-3. For stock keepers trying to work out how close the problem is, official case maps now matter almost as much as market prices. Government maps show premises where one or more animals have tested positive for BTV-3, BTV-8 or BTV-12. For many farmers, that is the quickest way of judging whether this still feels like somebody else's problem or one that could reach the next parish.

The risk picture has shifted with the weather. Defra says the midges that spread bluetongue became active again on 31 March 2026, and the recent run of warmer conditions means cumulative temperatures are now high enough for the virus to develop inside those insects. In plain terms, onward transmission is now possible. Officials also say temperatures in much of nearby continental Europe are high enough for infected midges there to become infectious too, which raises the chance of virus pressure from across the Channel. The overall risk of incursion from all routes is classed as medium, meaning it occurs regularly, although Defra says the specific risk from airborne incursion is negligible. Infection can also pass through germinal products such as semen, ova and embryos, which is why breeding rules remain much tighter than ordinary on-farm movements.

For English farms, the biggest practical point is that the whole of England sits inside a bluetongue restricted zone. Animals can move within England without a specific bluetongue licence or pre-movement testing. That removes one layer of paperwork, but it does not mean the disease has eased off; it simply means the rules have shifted to reflect how widely the virus is now being managed. Wales is also under a country-wide restricted zone, in place since 00:01 on 10 November 2025. That has reopened free livestock movement between England and Wales without bluetongue vaccination or other mitigation measures at the border. The line is firmer around germinal products. In England, anyone wanting to freeze semen, ova or embryos needs a specific licence and required testing, with sampling, postage and laboratory costs falling to the keeper. Wales is keeping donor testing in place before those products can be frozen or marketed.

For northern livestock businesses, that split between ordinary movements and breeding material is the bit worth watching. A farm might still move stock within England, or across to Wales, without a fresh bluetongue licence, yet face extra checks and extra cost the moment semen or embryos are involved. On pedigree units, dairy holdings and breeding enterprises, that is not a side issue; it goes straight to next season's plans. Defra is continuing to point keepers towards BTV-3 vaccination and day-to-day biosecurity advice aimed at slowing spread. Farmers are being told to watch for signs, report suspicion quickly and check the official movement guidance before shifting animals or animal products. The Animal and Plant Health Agency remains the contact point for camelid keepers, including alpaca and llama owners, and for anyone unsure which rules apply to their holding.

There is a wider backdrop here. Defra says the first BTV-3 case of the 2025 to 2026 vector season was confirmed on 11 July 2025. Before that, it had already recorded 160 BTV-3 cases in England and two linked to high-risk moves in Wales between 26 August 2024 and 31 May 2025, along with one BTV-12 case in England on 7 February 2025. Go back further still, and between November 2023 and March 2024 the government confirmed 126 BTV-3 cases on 73 premises, the first UK incursions for more than 15 years. The last confirmed outbreak before this run was BTV-8 in 2007 and 2008. That history is why this latest update matters well beyond the counties named in the bulletin. For Cumbrian beef units, Yorkshire dairy herds, border farms and Welsh breeding stock keepers, bluetongue is now part of the working week again: another disease risk to factor in, another set of rules to check, and another reminder that rural policy is only useful if it makes sense on the ground.